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RESTHeart MongoDB - MongoDB plugin
/*-
* ========================LICENSE_START=================================
* restheart-mongodb
* %%
* Copyright (C) 2014 - 2024 SoftInstigate
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see }
*/
public class DbUtils {
/**
*
*/
public final static Logger LOGGER = LoggerFactory.getLogger(DbUtils.class);
/**
*
*/
public static final int DUPLICATE_KEY_ERROR = 11000;
/**
*
*/
public static final int BAD_VALUE_KEY_ERROR = 2;
/**
*
*/
public final static FindOneAndUpdateOptions FAU_UPSERT_OPS = new FindOneAndUpdateOptions().upsert(true).returnDocument(ReturnDocument.AFTER);
/**
*
*/
public final static FindOneAndUpdateOptions FAU_NOT_UPSERT_OPS = new FindOneAndUpdateOptions().upsert(false).returnDocument(ReturnDocument.AFTER);
/**
*
*/
public final static FindOneAndUpdateOptions FOU_AFTER_UPSERT_OPS = new FindOneAndUpdateOptions().upsert(true).returnDocument(ReturnDocument.AFTER);
/**
*
*/
public final static FindOneAndReplaceOptions FOR_AFTER_UPSERT_OPS = new FindOneAndReplaceOptions().upsert(true).returnDocument(ReturnDocument.AFTER);
/**
*
*/
public final static FindOneAndUpdateOptions FOU_AFTER_NOT_UPSERT_OPS = new FindOneAndUpdateOptions().upsert(false).returnDocument(ReturnDocument.AFTER);
/**
*
*/
public final static FindOneAndReplaceOptions FOR_AFTER_NOT_UPSERT_OPS = new FindOneAndReplaceOptions().upsert(false).returnDocument(ReturnDocument.AFTER);
/**
*
*/
public final static UpdateOptions U_UPSERT_OPS = new UpdateOptions().upsert(true);
/**
*
*/
public final static UpdateOptions U_NOT_UPSERT_OPS = new UpdateOptions().upsert(false);
/**
*
*/
public final static ReplaceOptions R_NOT_UPSERT_OPS = new ReplaceOptions().upsert(false);
/**
*
*/
public final static BulkWriteOptions BWO_NOT_ORDERED = new BulkWriteOptions().ordered(false);
private static final Bson IMPOSSIBLE_CONDITION = exists("_id", false);
/**
* Writes a mongo document
*
* The MongoDB write operation depends on the request method and on the write mode as follows:
* --------------------------------------------------------------------------------------------
* | wm | method | URI | write operation | wrop argument |
* --------------------------------------------------------------------------------------------
* | insert | POST | /coll | insertOne | document |
* | insert | PUT | /coll/docid | insertOne | document |
* | insert | PATCH | /coll/docid | findOneAndUpdate(upsert:true)(1)| update operator expr |
* --------------------------------------------------------------------------------------------
* | update | POST | /coll | findOneAndReplace(upsert:false) | document |
* | update | PUT | /coll/docid | findOneAndReplace(upsert:false) | document |
* | update | PATCH | /coll/docid | findOneAndUpdate(upsert:false) | update operator expr |
* --------------------------------------------------------------------------------------------
* | upsert | POST | /coll | findOneAndReplace(upsert:true) | document |
* | upsert | PUT | /coll/docid | findOneAndReplace(upsert:true) | document |
* | upsert | PATCH | /coll/docid | findOneAndUpdate(upsert:true) | update operator expr |
* --------------------------------------------------------------------------------------------
* (1) uses a find condition that won't match any existing document, making sure the operation is an insert
*
*
* @param cs the client session
* @param method the request method
* @param writeMode the write mode
* @param coll the collection
* @param documentId use Optional.empty() to specify no documentId
* @param filter
* @param shardKeys
* @param data
* @return the OperationResult
*/
public static OperationResult writeDocument(
final Optional cs,
final METHOD method,
final WRITE_MODE writeMode,
final MongoCollection coll,
final Optional documentId,
final Optional filter,
final Optional shardKeys,
final BsonValue data) {
Objects.requireNonNull(coll);
Objects.requireNonNull(data);
Objects.requireNonNull(writeMode);
var query = documentId.isPresent() ? eq("_id", documentId.get()) : IMPOSSIBLE_CONDITION;
if (shardKeys.isPresent() && !shardKeys.get().isEmpty()) {
query = and(query, shardKeys.get());
}
if (filter.isPresent() && !filter.get().isEmpty()) {
query = and(query, filter.get());
}
// if update, docId is mandatory
if (writeMode == WRITE_MODE.UPDATE && !documentId.isPresent()) {
LOGGER.trace("write request with writeMode=update and missing document id");
return new OperationResult(HttpStatus.SC_BAD_REQUEST);
}
// get the oldDocument depending on the request method
var oldDocument = switch (writeMode) {
case INSERT -> null;
case UPDATE -> cs.isPresent() ? coll.find(cs.get(), query).first() : coll.find(query).first() ;
case UPSERT -> documentId.isPresent()
? cs.isPresent() ? coll.find(cs.get(), query).first() : coll.find(query).first()
: null;
};
if (writeMode == WRITE_MODE.UPDATE && oldDocument == null) {
return new OperationResult(HttpStatus.SC_NOT_FOUND);
}
return switch(writeMode) {
case INSERT -> switch(method) {
case PATCH -> {
try {
if (data.isArray()) {
List updateAggregation = data.asArray().stream().map(d -> (Bson) d).collect(Collectors.toList());
var newDocument = cs.isPresent()
? coll.findOneAndUpdate(cs.get(), IMPOSSIBLE_CONDITION, updateAggregation, FAU_UPSERT_OPS)
: coll.findOneAndUpdate(IMPOSSIBLE_CONDITION, updateAggregation, FAU_UPSERT_OPS);
yield new OperationResult(-1, oldDocument, newDocument);
} else {
var dataDoc = data.asDocument();
var newDocument = cs.isPresent()
? coll.findOneAndUpdate(cs.get(), IMPOSSIBLE_CONDITION, getUpdateDocument(dataDoc, false), FAU_UPSERT_OPS)
: coll.findOneAndUpdate(IMPOSSIBLE_CONDITION, getUpdateDocument(dataDoc, false), FAU_UPSERT_OPS);
yield new OperationResult(-1, oldDocument, newDocument);
}
} catch (IllegalArgumentException iae) {
yield new OperationResult(HttpStatus.SC_BAD_REQUEST, null, iae);
}
}
case POST, PUT -> {
var dataDoc = data.asDocument(); // for PUT and POST data is a document
try {
resolveCurrentDateOperator(dataDoc.asDocument());
var insertedId = cs.isPresent()
? coll.insertOne(cs.get(), dataDoc).getInsertedId()
: coll.insertOne(dataDoc).getInsertedId();
if (insertedId != null) {
dataDoc.put("_id", insertedId);
}
yield new OperationResult(-1, null, dataDoc);
} catch (IllegalArgumentException iae) {
yield new OperationResult(HttpStatus.SC_BAD_REQUEST, null, iae);
}
}
default -> throw new UnsupportedOperationException("unsupported method " + method);
};
case UPDATE, UPSERT -> switch(method) {
case PATCH -> {
try {
final var ops = writeMode == WRITE_MODE.UPSERT ? FOU_AFTER_UPSERT_OPS : FOU_AFTER_NOT_UPSERT_OPS;
if (data.isArray()) {
List updateAggregation = data.asArray().stream().map(d -> (Bson) d).collect(Collectors.toList());
var newDocument = cs.isPresent()
? coll.findOneAndUpdate(cs.get(), query, updateAggregation, ops)
: coll.findOneAndUpdate(query, updateAggregation, ops);
yield new OperationResult(-1, oldDocument, newDocument);
} else {
var dataDoc = data.asDocument();
var newDocument = cs.isPresent()
? coll.findOneAndUpdate(cs.get(), query, getUpdateDocument(dataDoc, false), ops)
: coll.findOneAndUpdate(query, getUpdateDocument(dataDoc, false), ops);
yield new OperationResult(-1, oldDocument, newDocument);
}
} catch (IllegalArgumentException iae) {
yield new OperationResult(HttpStatus.SC_BAD_REQUEST, oldDocument, iae);
}
}
case PUT, POST -> {
var dataDoc = data.asDocument(); // for PUT and POST data is a document
try {
if (filter.isPresent() && !filter.get().isEmpty()) {
query = and(query, filter.get());
}
final var ops = writeMode == WRITE_MODE.UPSERT ? FOR_AFTER_UPSERT_OPS : FOR_AFTER_NOT_UPSERT_OPS;
var newDocument = cs.isPresent()
? coll.findOneAndReplace(cs.get(), query, getReplaceDocument(dataDoc), ops)
: coll.findOneAndReplace(query, getReplaceDocument(dataDoc), ops);
yield new OperationResult(-1, oldDocument, newDocument);
} catch (IllegalArgumentException iae) {
yield new OperationResult(HttpStatus.SC_BAD_REQUEST, oldDocument, iae);
}
}
default -> throw new UnsupportedOperationException("unsupported method " + method);
};
};
}
/**
*
* @param cs the client session
* @param coll
* @param documentId
* @param shardKeys
* @param data
* @param etag
* @param etagLocation
* @return
*/
public static boolean restoreDocument(
final Optional cs,
final MongoCollection coll,
final BsonValue documentId,
final Optional shardKeys,
final BsonDocument data,
final Object etag,
final String etagLocation) {
Objects.requireNonNull(coll);
Objects.requireNonNull(documentId);
Objects.requireNonNull(data);
Bson query;
if (etag == null) {
query = eq("_id", documentId);
} else {
query = and(eq("_id", documentId), eq(etagLocation != null && !etagLocation.isEmpty() ? etagLocation : "_etag", etag));
}
if (shardKeys.isPresent() && !shardKeys.get().isEmpty()) {
query = and(query, shardKeys.get());
}
var result = cs.isPresent()
? coll.replaceOne(cs.get(), query, data, R_NOT_UPSERT_OPS)
: coll.replaceOne(query, data, R_NOT_UPSERT_OPS);
return result.getModifiedCount() == 1;
}
/**
*
* @param cs the client session
* @param coll
* @param documents
* @param filter
* @param shardKeys
* @param writeMode
* @return
*/
public static BulkOperationResult bulkWriteDocuments(
final Optional cs,
final MongoCollection coll,
final BsonArray documents,
final Optional filter,
final Optional shardKeys,
final WRITE_MODE writeMode) {
Objects.requireNonNull(coll);
Objects.requireNonNull(documents);
var newEtag = new ObjectId();
var wm = getBulkWriteModel(
coll,
documents,
filter,
shardKeys,
newEtag,
writeMode);
var result = cs.isPresent()
? coll.bulkWrite(cs.get(), wm, BWO_NOT_ORDERED)
: coll.bulkWrite(wm, BWO_NOT_ORDERED) ;
return new BulkOperationResult(HttpStatus.SC_OK, newEtag, result);
}
/**
*
* @param newContent the value of newContent
* @return a not null BsonDocument
*/
static BsonDocument validContent(final BsonDocument newContent) {
return (newContent == null) ? new BsonDocument() : newContent;
}
/**
*
* @param mcoll
* @param documents
* @param filter
* @param shardKeys
* @param etag
* @return
*/
static List> getBulkWriteModel(
final MongoCollection mcoll,
final BsonArray documents,
final Optional filter,
final Optional shardKeys,
final ObjectId etag,
final WRITE_MODE writeMode) {
Objects.requireNonNull(mcoll);
Objects.requireNonNull(documents);
var updates = new ArrayList>();
documents.stream().filter(d -> d.isDocument())
.map(d -> d.asDocument())
.forEach(document -> {
// generate new id if missing, will be an insert
if (!document.containsKey("_id")) {
document.put("_id", new BsonObjectId(new ObjectId()));
}
// add the _etag
document.put("_etag", new BsonObjectId(etag));
var _filter = eq("_id", document.get("_id"));
if (shardKeys.isPresent() && !shardKeys.get().isEmpty()) {
_filter = and(_filter, shardKeys.get());
}
if (filter.isPresent() && !filter.get().isEmpty()) {
_filter = and(_filter, filter.get());
}
switch(writeMode) {
case UPSERT -> updates.add(new ReplaceOneModel<>(_filter, document, new ReplaceOptions().upsert(true)));
case UPDATE -> updates.add(new ReplaceOneModel<>(_filter, document, new ReplaceOptions().upsert(false)));
case INSERT -> updates.add(new InsertOneModel<>(document));
}
});
return updates;
}
/**
*
* @param data
* @return the document for update operation, with proper update operators
*/
static BsonDocument getUpdateDocument(final BsonDocument data) {
return getUpdateDocument(data, false);
}
/**
*
* @param data
* @param flatten if we should flatten nested documents' values using dot
* notation
* @return the document for update operation, with proper update operators
*/
static BsonDocument getUpdateDocument(final BsonDocument data, final boolean flatten) {
var ret = new BsonDocument();
// add other update operators
data.keySet()
.stream()
.filter(key -> BsonUtils.isUpdateOperator(key))
.forEach(key -> ret.put(key, data.get(key)));
// add properties to $set update operator
List keys;
keys = data.keySet()
.stream()
.filter(key -> !BsonUtils.isUpdateOperator(key))
.collect(Collectors.toList());
if (keys != null && !keys.isEmpty()) {
BsonDocument set;
if (flatten) {
set = BsonUtils.flatten(data, false);
} else {
set = new BsonDocument();
keys.stream().forEach(key -> set.append(key, data.get(key)));
}
if (!set.isEmpty()) {
if (ret.get("$set") == null) {
ret.put("$set", set);
} else if (ret.get("$set").isDocument()) {
ret.get("$set").asDocument().putAll(set);
} else {
// update is going to fail on mongodb
// error 9, Modifiers operate on fields but we found a String instead
LOGGER.debug("$set is not an object: {}", ret.get("$set"));
}
}
}
return ret;
}
/**
*
* @param doc
* @return the document for replace operation, without dot notation and
* replacing $currentDate operator
*/
static BsonDocument getReplaceDocument(final BsonDocument doc) {
if (BsonUtils.containsUpdateOperators(doc, false)) {
var ret = new BsonDocument();
ret.putAll(doc);
resolveCurrentDateOperator(ret);
return BsonUtils.unflatten(ret).asDocument();
} else {
return doc;
}
}
/**
* Replace { "$currentDate": {"key": true}} with { "key": { "$date": 12345... }}
*
* @param doc
* @throws IllegalArgumentException
*/
static void resolveCurrentDateOperator(BsonDocument doc) throws IllegalArgumentException {
var cd = doc.remove("$currentDate");
if (cd == null) {
return;
}
if (!cd.isDocument()) {
throw new IllegalArgumentException("wrong $currentDate operator");
}
long currentTimeMillis = System.currentTimeMillis();
cd.asDocument()
.entrySet()
.stream()
.forEach(entry -> {
if (BsonBoolean.TRUE.equals(entry.getValue())) {
doc.put(entry.getKey(), new BsonDateTime(currentTimeMillis));
} else if (entry.getValue().isDocument() && entry.getValue().asDocument().containsKey("$type")) {
if (new BsonString("date").equals(entry.getValue().asDocument().get("$type"))) {
doc.put(entry.getKey(), new BsonDateTime(currentTimeMillis));
} else if (new BsonString("timestamp").equals(entry.getValue().asDocument().get("$type"))) {
doc.put(entry.getKey(), new BsonTimestamp(currentTimeMillis));
} else {
throw new IllegalArgumentException("wrong $currentDate operator");
}
} else {
throw new IllegalArgumentException("wrong $currentDate operator");
}
});
}
}
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